Working Designs translated their entire website into Arabic, and claimed that it had been "hijacked" by Muslim terrorists, and whenever you tried to do anything, a swirly-eyed militant leader would redirect you to Al-Jazera.com.
I think it was very well done and a number of people thought it was funny, but the general feeling was that WD shouldn't have given any attention or control over their joke to Al-Jazera.com, which was a real website.
People were just visiting their favorite website, getting to enjoy a pretty funny April Fools Day joke, and then getting to see disturbing Iraqi propaganda pictures of little babies bleeding from head wounds.